SeasonMapCastro weather in December
Chile
December in Castro: nice, a little rain, with clean air — an excellent time to visit.
#3 of 12 months in Castro · #248 of 1383 destinations to visit in December · comfort 86/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Castro in December
No notes yet. Open Castro on the map to add the first one.
Castro climate normals — December
| Daytime high | 18°C / 65°F | 😎 nice |
|---|---|---|
| Nighttime low | 10°C / 50°F | |
| Feels like (high) | 18°C / 64°F | |
| Sea temperature | 14°C / 56°F | 🥶 cold sea |
| Rainfall | 72 mm / 2.8 in | 🌦 some rain |
| Rainy days | 11 days | |
| Humidity | 76% | 💦 very humid |
| Dew point | 9°C / 49°F | |
| Sunshine | 10.9 h/day | |
| Daylight | 15.2 h | |
| Wind | 15 km/h / 9 mph | |
| Air quality (US AQI) | 19 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Castro in December
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusySummer holidays in Chile, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Castro's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Best weatherCastro's weather peaks December–February.
Best weatherFair weatherToughest weather
Nearby, and something's on
Within 300 km of Castro — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Castro?
Castro in December — FAQ
- Is December a good time to visit Castro?
- December in Castro: nice, a little rain, with clean air — an excellent time to visit. It ranks #3 of 12 months for Castro on SeasonMap's comfort score (86/100).
- What is the weather like in Castro in December?
- In December, Castro averages a daily high of 18.1°C and a low of 9.9°C, with about 72.2 mm of rain over roughly 11 rainy days.
- What is the air quality in Castro in December?
- Castro has a mean US Air Quality Index of about 19 in December.
Other months in Castro
Compare Castro in December
Warmer or cooler than Castro in December
Similar destinations in South America — December
Within 300 km: San Carlos de Bariloche's Lupins on the roadsides around 15 Nov – 10 Jan.